Information and Ideas

Literary scholar Dr. Elena Rostova investigated the influence of industrialization on pastoral poetry in early nineteenth-century Britain. She hypothesized that poets living in rapidly urbanizing northern cities, such as Manchester, frequently incorporated mechanical or industrial metaphors into their depictions of nature to express anxiety about environmental change. In contrast, she argued, poets living in the agrarian south of England continued to use traditional, unmechanized pastoral imagery.

Which choice, if true, would most directly support Rostova's hypothesis?

Phytoplankton produce dimethylsulfoniopropionate (DMSP), which marine bacteria convert into dimethyl sulfide (DMS), a volatile gas that helps seed clouds and reflect solar radiation. Some marine viruses lysogenize phytoplankton, delaying cell death during nutrient-rich periods but triggering rapid lysis under ultraviolet-B (UVB) stress. A research team hypothesized that increased UVB radiation, which typically damages phytoplankton, might paradoxically accelerate DMS-induced cloud cooling. They found that although UVB stress did induce widespread viral lysis, releasing a massive pulse of DMSP into the water column, it also severely depleted the populations of DMS-converting bacteria that rely on living host exudates. Which choice most logically completes the text?

For over a century, neuroscientists concentrated almost exclusively on neurons as the sole pathways of information transmission in the brain, relegating glial cells to a purely supportive, structural role. Often described as the 'glue' holding neural networks together, glia were assumed to be inactive in cognitive processes. However, recent research has overturned this view by demonstrating that astrocytes, a type of glial cell, actively modulate synaptic transmission and play a crucial role in synaptic plasticity. By releasing chemical transmitters called gliotransmitters, these cells communicate with neurons and influence learning and memory. Consequently, neurobiology is shifting toward a model where glial cells are recognized as active partners in neural communication rather than passive scaffolding.

Which choice best states the main idea of the text?

Sociologist Dr. Evelyn Diaz investigated the relationship between remote work and local civic engagement. Some theorists argue that working from home naturally fosters stronger ties to one's immediate geographic community. However, Diaz hypothesized that remote workers do not actually participate in local community events or interact with neighbors at higher rates than traditional commuting workers do, because remote workers primarily use their flexible schedules to manage domestic responsibilities rather than to socialize locally.

Which finding, if true, would most directly support Diaz's hypothesis?

Hydrangea macrophylla shrubs produce flowers that can range in color from blue to pink. This color variation is determined by the availability of aluminum ions in the soil, which the plant requires to synthesize its blue pigment. In highly acidic soils, typically with a pH of $5.5$ or lower, aluminum is soluble and easily absorbed by the root system, resulting in blue flowers. In contrast, in neutral to alkaline soils with a pH of $6.5$ or higher, aluminum becomes chemically insoluble and cannot be taken up by the plant. Which choice most logically completes the text?

In cognitive psychology, the 'cognitive reserve' hypothesis suggests that intellectually stimulating activities help maintain brain function as people age. Researcher Elena Rostova and her team compared executive function—specifically cognitive flexibility—in older bilingual individuals and older monolingual individuals. The researchers observed that among participants who rarely engaged in mentally challenging hobbies, bilinguals significantly outperformed monolinguals. However, among participants who regularly played musical instruments or solved complex puzzles, monolinguals performed just as well as bilinguals. Given that playing music and solving puzzles stimulate the same neural networks responsible for managing multiple languages, Rostova's team concluded that ______

Which choice most logically completes the text?

For many years, geologists viewed the Neoproterozoic "Snowball Earth" glaciations as periods of absolute planetary stagnation, during which global ice cover halted all hydrological cycles and biological activity. However, recent geochemical analyses of glacial deposits from this era have revealed fluctuations in carbon isotopes that suggest ice sheet dynamics were highly active. Instead of being completely frozen and static, the planet likely experienced transient warm periods and localized open-ocean basins. These dynamic conditions allowed for the survival and even diversification of early eukaryotic organisms, indicating that the glacial epochs were far more ecologically active than previously assumed.

Which choice best states the main idea of the text?

In a study of ancient Roman concrete structures, architectural historian Dr. Marcus Vance examined the composition of marine concrete used in various harbors constructed between 100 BCE and 100 CE. Many engineers have argued that Roman builders deliberately selected volcanic ash from Mount Vesuvius for its chemical properties, which react with seawater to increase structural durability over time. Vance, however, contends that the use of volcanic ash was not a deliberate engineering strategy for longevity, but rather a reflection of local resource availability, with builders using volcanic materials simply because they were the most accessible aggregates near major construction sites.

Which choice, if true, would most directly support Vance's contention?

Agricultural scientists studying soil health have observed that compacted soil contains fewer pore spaces, which restricts the flow of oxygen and water to plant roots. In a study, researchers compared tomato plants grown in highly compacted soil with those grown in loose, well-aerated soil. The plants in the compacted soil developed significantly shorter and less branched root systems. Because robust root systems are necessary for plants to efficiently absorb essential nutrients from the surrounding environment, it is highly likely that plants grown in compacted soil will ________.

Which choice most logically completes the text?

Many species of clownfish rely on the stinging tentacles of sea anemones for protection from predators. In turn, the clownfish defend the anemones against butterflyfish, which eat anemone tentacles. A research team observed that anemones inhabited by clownfish exhibit significantly higher growth rates and faster tissue regeneration than those without resident clownfish. The researchers also noted that clownfish excrete ammonia, a primary source of nitrogen that anemones need to build new tissue. Since nitrogen is typically scarce in coral reef waters, these excretions likely serve as a vital fertilizer. Which choice most logically completes the text?

In arid ecosystems, 'nurse plants'—mature shrubs or trees that facilitate the growth of younger plants beneath their canopies—play a crucial role in maintaining biodiversity. By offering shade, reducing soil temperatures, and increasing moisture retention, these established plants create hospitable microclimates that allow vulnerable seedlings of other species to survive and establish themselves. Although nurse plants may eventually compete with these younger plants for resources like water and nutrients as they mature, the initial protective effect is essential for seedling recruitment in harsh environments. Consequently, the presence of nurse plants determines the spatial distribution and species composition of plant communities in desert habitats.

Which choice best states the main idea of the text?

For decades, biologists assumed that the deep subsurface of the Earth was entirely sterile due to extreme heat, pressure, and the absolute absence of sunlight. However, the discovery of diverse microbial communities thriving miles beneath the seafloor has overturned this assumption. These subterranean organisms, often referred to as "intraterrestrials," do not rely on photosynthesis; instead, they harvest energy from inorganic chemical reactions, such as the oxidation of hydrogen or sulfur compounds. This finding has not only expanded our understanding of the environmental limits of life on Earth but has also broadened the search for extraterrestrial life, suggesting that biosphere-sustaining conditions might exist beneath the surfaces of otherwise inhospitable planets.

Which choice best states the main idea of the text?

In atmospheric chemistry, the hydroxyl radical ($\text{OH}$) is the primary oxidant clearing pollutants from the lower atmosphere. Scientists long assumed that dense forest canopies, which emit high levels of volatile organic compounds (VOCs) like isoprene, would rapidly deplete local $\text{OH}$ concentrations. However, recent measurements in pristine tropical forests revealed stable $\text{OH}$ levels despite intense VOC emissions. To explain this, chemists simulated canopy conditions and found that the oxidation of isoprene by $\text{OH}$, under the low-nitrogen-oxide conditions typical of remote forests, initiates a series of isomerization steps that regenerate $\text{OH}$ molecules. This suggests that ______

Which choice most logically completes the text?

In a study of ancient agricultural practices, archaeobotanist Dr. Leila Hayashi examined charred plant remains from various domestic structures in the 8th-century BCE city of Gordion. Hayashi hypothesized that the introduction of new canal irrigation techniques during this period led farmers to prioritize water-intensive crops, such as flax, over drought-tolerant grains, such as barley, in agricultural fields situated closest to the Sangarios River.

Which choice best describes findings from Hayashi's study that, if true, would most directly support her hypothesis?

In a study of early twentieth-century American labor movements, historian Dr. Kenji Tanaka examined the journals of textile factory workers in New England. Tanaka hypothesized that workers who regularly participated in informal workplace reading groups, or 'study circles,' were more likely to lead local unionization efforts than those who only attended formal union lectures. Tanaka argued that these informal groups fostered closer interpersonal trust and shared political vocabulary, which are critical for organizing collective action. Which choice, if true, would most directly support Tanaka's hypothesis?

Biologist Dr. Fiona Gallagher and colleagues investigated the flight initiation distance (FID)—the distance at which an animal begins to flee an approaching human—of eastern gray squirrels (*Sciurus carolinensis*) in urban parks and rural forests. The team hypothesized that while rural squirrels treat any approaching human as a generalized threat, urban squirrels have habituated to humans and distinguish between different levels of threat based on human behavior. Specifically, the researchers proposed that urban squirrels flee at greater distances only when an approaching human makes direct eye contact with them. Which finding, if true, would most directly support the researchers' hypothesis?

During the early modern period, European cartographers frequently populated uncharted oceanic spaces with phantom islands, such as Frisland or Buss. While historians once dismissed these cartographic fabrications as mere artistic whim or horror vacui—the fear of empty spaces—recent analyses suggest a more calculated motive. By asserting the existence of these territories, mapmakers provided patron nations with prospective maritime claims, reinforcing national prestige and motivating exploratory voyages. Thus, speculative cartography was not merely an aesthetic choice to fill geographic voids; rather, it functioned as a geopolitical tool designed to project territorial influence and stimulate imperial ambition in unexplored regions.

Which choice best states the main idea of the text?

In a study of linguistic sound symbolism, researcher Dr. Mei-Ling Chen and her colleagues investigated "phonaesthemes"—specific sound sequences associated with particular meanings, such as the "fl-" in English words like "fly," "flee," and "flow" associated with movement. While traditional linguistics posits that the relationship between a word's sound and its meaning is arbitrary, Chen hypothesized that certain phonaesthemes are cross-linguistically persistent because they evoke universal sensory associations. Specifically, she proposed that words representing "sharp or sudden visual light" are disproportionately likely to contain high-frequency, front-vowel sounds across unrelated language families. Which choice, if true, would most directly support Chen's hypothesis?

In historical linguistics, the comparative method reconstructs ancestral proto-languages by comparing cognates in daughter languages. Historically, scholars assumed that phonological sound laws operate without exception across an entire lexicon, meaning that any phonological change must affect all eligible words at the same time. However, recent analyses of the Sinitic language family show that certain high-frequency vocabulary items resisted sound changes for centuries, remaining phonetically conservative even in isolated dialects where dialect borrowing was impossible. Since these conservative items show no morphological alterations that could explain their resistance, linguists hypothesize that ______

Which choice most logically completes the text?

For decades, translation theorists operated under the assumption that a translator's primary duty was to achieve complete transparency, effectively rendering their own presence invisible in the translated text to preserve the original author's voice. However, translation scholar Lawrence Venuti challenged this paradigm by introducing the concept of 'foreignization'—a strategy that deliberately retains culture-specific elements and unconventional grammatical structures of the source text. Venuti argued that rather than performing a seamless transfer of meaning, translation should highlight the linguistic and cultural differences between the source and target languages. By resisting the domesticating impulse to make a text sound completely natural to target readers, foreignization forces readers to confront the foreign origin of the text and acknowledges the translator's active role in shaping the cross-cultural encounter.

Which choice best states the main idea of the text?